USB mass storage driver (#146)

Tactility/Source/app/usbsettings/UsbSettings.cpp

@@ -0,0 +1,45 @@
+#include "lvgl.h"
+#include "lvgl/Toolbar.h"
+#include "hal/usb/Usb.h"
+
+#define TAG "usb_settings"
+
+namespace tt::app::usbsettings {
+
+static void onRebootMassStorage(TT_UNUSED lv_event_t* event) {
+    hal::usb::rebootIntoMassStorageSdmmc();
+}
+
+static void onShow(AppContext& app, lv_obj_t* parent) {
+    auto* toolbar = lvgl::toolbar_create(parent, app);
+    lv_obj_align(toolbar, LV_ALIGN_TOP_MID, 0, 0);
+
+    if (hal::usb::canRebootIntoMassStorageSdmmc()) {
+        auto* button = lv_button_create(parent);
+        auto* label = lv_label_create(button);
+        lv_label_set_text(label, "Reboot as USB storage");
+        lv_obj_align(button, LV_ALIGN_CENTER, 0, 0);
+        lv_obj_add_event_cb(button, onRebootMassStorage, LV_EVENT_SHORT_CLICKED, nullptr);
+    } else {
+        bool supported = hal::usb::isSupported();
+        const char* first = supported ? "USB storage not available:" : "USB driver not supported";
+        const char* second = supported ? "SD card not mounted" : "on this hardware";
+        auto* label_a = lv_label_create(parent);
+        lv_label_set_text(label_a, first);
+        lv_obj_align(label_a, LV_ALIGN_CENTER, 0, 0);
+        auto* label_b = lv_label_create(parent);
+        lv_label_set_text(label_b, second);
+        lv_obj_align_to(label_b, label_a, LV_ALIGN_OUT_BOTTOM_MID, 0, 4);
+    }
+
+}
+
+extern const AppManifest manifest = {
+    .id = "UsbSettings",
+    .name = "USB",
+    .icon = LV_SYMBOL_USB,
+    .type = TypeSettings,
+    .onShow = onShow
+};
+
+} // namespace